How to Use the Gumroad MCP in Mastra AI

Q: How do I register Gumroad tools in Mastra AI?

Instantiate the client using @mastra/mcp and point it to your Vinkius MCP Server URL. Spread the tools from mcpClient.listTools() directly into your Mastra agent configuration to give it immediate access.

Q: Can I require human approval before Mastra AI refunds a Gumroad sale?

Yes, you can set requireToolApproval on the refundsale tool inside Mastra. This pauses the workflow and alerts you before any money actually leaves your account.

Q: Can I build branching workflows for product pricing changes?

Yes. You can configure Mastra to run getproduct first, inspect the pricing tiers, and then run distinct workflows based on whether the item is a one-time purchase or a subscription.

Build automated, multi-step workflows that check Gumroad licenses and handle payouts using Mastra AI and MCP.

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Connect Gumroad MCP to Mastra AI

Create your Vinkius account to connect Gumroad to Mastra AI and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Gumroad with Mastra AI

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Run automated license checks with Mastra AI

Your workflow executes `verify_license` to check incoming license keys and trigger backend actions based on the result. If a key is invalid, the agent automatically retries the check or flags the account for review. Mastra AI handles the conditional logic so you can branch your code depending on whether the license is active or expired. It takes the guesswork out of access control by managing the retry logic for you.

Multi-step payout tracking workflows

The agent runs `list_payouts` and `get_my_profile` to monitor your store's earnings and write them directly to your internal accounting ledgers. If a payout fails, the built-in workflow engine retries the operation with exponential backoff. This MCP Server integration gives your automated agents the exact tools they need to audit your store's financial health. You don't have to write custom cron jobs or error-handling boilerplate to track your revenue.

Automated subscription churn mitigation

The system executes `list_subscribers` to identify users whose payments have failed or whose subscriptions are about to lapse. It then triggers targeted email sequences to recover those subscribers before they churn. Using this setup, your Mastra AI agents can automatically issue a partial refund via `refund_sale` if a customer disputes a double charge. The framework handles the entire process without requiring manual intervention from your support team.

Setup guide

Set up Gumroad MCP in Mastra AI

Prerequisites

Node.js 18+ and a TypeScript project
@mastra/mcp + @mastra/core packages
Active Vinkius subscription with a valid endpoint token

1

Install dependencies
Run npm install @mastra/mcp @mastra/core plus your preferred model provider (e.g. @ai-sdk/openai).
2

Configure the MCPClient
Create an MCPClient with your Vinkius endpoint as a URL object. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com.
3

Discover and inject tools
Call mcpClient.listTools() and spread the result into your agent's tools object. All Gumroad tools become native Mastra tools.
4

Run with any model
Swap openai("gpt-4o") for any AI SDK-compatible provider. Call agent.generate() and the agent routes tool calls through MCP automatically.

agent.ts

import { MCPClient } from "@mastra/mcp";
import { Agent } from "@mastra/core/agent";
import { openai } from "@ai-sdk/openai";

const mcpClient = new MCPClient({
  id: "gumroad-mcp-client",
  servers: {
    "gumroad-mcp": {
      url: new URL(
        "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
      ),
    },
  },
});

const agent = new Agent({
  name: "Gumroad Agent",
  model: openai("gpt-4o"),
  instructions: "You have access to Gumroad tools.",
  tools: {
    ...(await mcpClient.listTools()),
  },
});

const result = await agent.generate(
  "List recent Gumroad transactions"
);
console.log(result.text);

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Gumroad. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Gumroad MCP in Mastra AI

Instantiate the client using `@mastra/mcp` and point it to your Vinkius MCP Server URL. Spread the tools from `mcpClient.listTools()` directly into your Mastra agent configuration to give it immediate access.

Yes, you can set `requireToolApproval` on the `refund_sale` tool inside Mastra. This pauses the workflow and alerts you before any money actually leaves your account.

The framework uses built-in exponential backoff when calling tools like `list_sales` or `list_subscribers`. If the API throttles your agent, Mastra pauses and retries the call automatically.

Yes. You can configure Mastra to run `get_product` first, inspect the pricing tiers, and then run distinct workflows based on whether the item is a one-time purchase or a subscription.

The MCP endpoint runs the server in an ephemeral, zero-trust sandbox that isolates your financial records. Mastra AI accesses your payout history and profile details over secure, encrypted tunnels, ensuring no sensitive data is leaked or stored.

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